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.. _stere:
********************************************************************************
Stereographic
********************************************************************************
+---------------------+----------------------------------------------------------+
| **Classification** | Azimuthal |
+---------------------+----------------------------------------------------------+
| **Available forms** | Forward and inverse, spherical and ellipsoidal |
+---------------------+----------------------------------------------------------+
| **Defined area** | Global |
+---------------------+----------------------------------------------------------+
| **Alias** | stere |
+---------------------+----------------------------------------------------------+
| **Domain** | 2D |
+---------------------+----------------------------------------------------------+
| **Input type** | Geodetic coordinates |
+---------------------+----------------------------------------------------------+
| **Output type** | Projected coordinates |
+---------------------+----------------------------------------------------------+
.. figure:: ./images/stere.png
:width: 500 px
:align: center
:alt: Stereographic
proj-string: ``+proj=stere +lat_0=90 +lat_ts=75``
Parameters
################################################################################
.. note:: All parameters are optional for the projection.
.. include:: ../options/lat_0.rst
.. option:: +lat_ts=<value>
Defines the latitude where scale is not distorted. It is only taken into
account for Polar Stereographic formulations (``+lat_0`` = +/- 90 ), and
then defaults to the ``+lat_0`` value.
If set to a value different from +/- 90, it takes precedence over ``+k_0``
if both options are used together.
.. include:: ../options/k_0.rst
.. include:: ../options/lon_0.rst
.. include:: ../options/ellps.rst
.. include:: ../options/R.rst
.. include:: ../options/x_0.rst
.. include:: ../options/y_0.rst
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